Kerchove 1961, p. 901, Waterlines. Kerchove, René de baron (1961). International Maritime Dictionary: An Encyclopedic Dictionary of Useful Maritime Terms and Phrases, Together with Equivalents in French and German (2 ed.). Van Nostrand Reinhold. ISBN978-0-442-02062-0. OCLC1039382382.
Kerchove 1961, pp. 464–465, Load Waterline. Kerchove, René de baron (1961). International Maritime Dictionary: An Encyclopedic Dictionary of Useful Maritime Terms and Phrases, Together with Equivalents in French and German (2 ed.). Van Nostrand Reinhold. ISBN978-0-442-02062-0. OCLC1039382382.